Ligature device for orthodontics

European Patent Office Patent

PATENT NO 1600115
APP PUB NO EP-1600115-A1
SERIAL NO

05008914

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Abstract

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Ligature device for orthodontic brackets, consisting of an elastic body with a central portion (5) and two lateral rings (6) positioned on two mesodistal sides of said central portion (5), on opposite sides with respect to the latter, said rings being intended to be stretched to be coupled with the wings (2) of an orthodontic bracket so that said central portion (5) results above the same bracket wings (2), characterized in that said lateral rings (6) form at least a curve (65) corresponding to a mesodistal side of said othodontic bracket at the height of said wings (2), the vertex of said at least one curve (65) being turned toward the orthodontic bracket, that is to say toward said central portion (5) of the ligature device, the length (a) of each of said rings (6) exceeding the length (c) of said central portion (5) both when the rings (6) are stretched and un-stretched, so that the value of the ratio (a)/(c) is less than one in both said stretched and un-stretched configurations.

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